diff options
| author | Scott Wood <scottwood@freescale.com> | 2007-07-16 11:43:43 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2007-10-03 20:35:43 -0500 |
| commit | c374e00e17f1c10768d5af922a1ff33e43df2eb0 (patch) | |
| tree | fc6149e7f3b86bb202c475d4414a926c481761b8 /arch/powerpc/sysdev | |
| parent | e631ae3b164158fbf486fbed5adb597696c4f0e5 (diff) | |
[POWERPC] Add early debug console for CPM serial ports.
This code assumes that the ports have been previously set up, with
buffers in DPRAM.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/Makefile | 1 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/cpm_common.c | 46 |
2 files changed, 47 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile index 592c17ea713d..52e93bca10ca 100644 --- a/arch/powerpc/sysdev/Makefile +++ b/arch/powerpc/sysdev/Makefile @@ -31,6 +31,7 @@ endif # Temporary hack until we have migrated to asm-powerpc ifeq ($(ARCH),powerpc) +obj-$(CONFIG_CPM) += cpm_common.o obj-$(CONFIG_CPM2) += cpm2_common.o cpm2_pic.o obj-$(CONFIG_8xx) += mpc8xx_pic.o commproc.o obj-$(CONFIG_UCODE_PATCH) += micropatch.o diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c new file mode 100644 index 000000000000..9daa6ac67676 --- /dev/null +++ b/arch/powerpc/sysdev/cpm_common.c @@ -0,0 +1,46 @@ +/* + * Common CPM code + * + * Author: Scott Wood <scottwood@freescale.com> + * + * Copyright 2007 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <asm/udbg.h> +#include <asm/io.h> +#include <asm/system.h> +#include <mm/mmu_decl.h> + +#ifdef CONFIG_PPC_EARLY_DEBUG_CPM +static u32 __iomem *cpm_udbg_txdesc = + (u32 __iomem __force *)CONFIG_PPC_EARLY_DEBUG_CPM_ADDR; + +static void udbg_putc_cpm(char c) +{ + u8 __iomem *txbuf = (u8 __iomem __force *)in_be32(&cpm_udbg_txdesc[1]); + + if (c == '\n') + udbg_putc('\r'); + + while (in_be32(&cpm_udbg_txdesc[0]) & 0x80000000) + ; + + out_8(txbuf, c); + out_be32(&cpm_udbg_txdesc[0], 0xa0000001); +} + +void __init udbg_init_cpm(void) +{ + if (cpm_udbg_txdesc) { +#ifdef CONFIG_CPM2 + setbat(1, 0xf0000000, 0xf0000000, 1024*1024, _PAGE_IO); +#endif + udbg_putc = udbg_putc_cpm; + } +} +#endif |